The bulge first appeared in 1996 and has now returned, but Yellowstone Volcano Observatory says there's no cause for alarm.
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A Chicago-sized bulge has appeared near Yellowstone’s volcano — and scientists say it’s growing
Yellowstone National Park is a must-visit site for its geothermal features. From hot springs to geysers, the place is embellished with serene views at every corner. Beneath the park's landscape lies a ...
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